Zooey Deschanel and Katy Perry

Zooey Deschanel (left) and Katie Perry (right) posed for this shot way back in 2006

Thanks to their beaming blue eyes, their quirky characters (in the early 2000s especially) and their jet black hair, many people were quick to draw the comparison between actress Zooey and pop star Katy.

In fact, confusion between the two has become such a thing that Zooey told MTV it was actually beginning to grate on her.

She said in 2009: "It's a little bit annoying, to be totally blunt. The only similarity that we have is that we look a little bit alike.

"I have met her before. She seems like a nice person. I'm happy that she's famous enough now that she's not going out and being mistaken for me."